Drawing and pushing device for central couplings of vehicles



Sept. 16, 1930. A. SCHRELLE ET AL 1,775,972

DRAWING AND PUSHING DEVICE FOR CENTRAL COUPLINGS OF VEHICLES Fiied March22, 1928 musurozs ADOLF scHKELLE Z4 25' 23 JOHAIIN LENZ ATTINE) PatentedSept. 16, 1930 UNITED STATEd Parana" crates DRAWING AND PUSHING DEVICEFOR CENTRAL COUPLINGS OF VEHICLES Application filed March 22, 1928,Serial No. 263,738, and in Austria March 3, 1927.

Some known drawing and pushing devices for central couplings of vehiclesconsist, as diagrammatically shown in Fig. 1, of a spring loaded drawingbolt 2 to which is pivotally secured a bulfer-rod 3 by means of abolt 1. This arrangement possesses the drawback that when travellinground curves or bends the buffer-rod rotates about the pivot asindicated in dash-dotted lines, whereby the drawing bolt is subjected atan incline by the tensile or impact forces (for instance I?) and (asshown by the diagram of forces in the pivot 3) a component P arises (ata right angle to the drawing bolt), which causes detrimental transversestresses R and R in the bearings F and F Therefore in case of strongershocks the drawing bolts will be bent and the bearings F F as well asthe bolt 1 are quickly worn,

so that a kicking takes place when starting and braking. The spring isalso detrimentally affected by the frictional forces in the bearings.

This invention relates to a drawing and Z5 pushing device which removesthese drawbacks and which is illustrated by way of example on theaccompanying sheet of drawings, in which Fig. 2 is a sectional View ofthe device in the direction of the axis of the vehicle.

Fig. 3 is a part sectional view of the device shown in Fig. 2, thesection being taken on line ab of Fig. 2, and

Fig. 1 is a plan view of the device.

The buffenrod 2 is provided with a square head 5 and at 6 is reduced toa cylindric bolt 7, which is surrounded by a spring 10, disposed betweentwo discs 8 and 9, said discs functioning as followers. A nut 11 isscrewed onto the screw-threaded end of the bolt '7 and thereby a washer12 is forced against a tubular extension 9 of the diScQ, while the otherdisc 8 rests on the neck 6.

The square head 5 and the tubular extension 9* pass through suitablyshaped apertures of a hollow spherical member 15, which is snugly fittedin a spherical casing 16 but can readily rotate or turn in anydirection. The said casing 16 (divided according to the W horizontalcentral plane m-y of Fig. 3) consists of two hemispherical members,which are fitted together by means of screw-bolts 17, passing throughsuitable holes in the flanges 18 of the two hemispherical members.Extensions 19, provided at both sides of the spherical casing, arefurnished with holes for the insertion of screw bolts 20 which securethe whole device to the frame 21 of the vehicle.

In order to facilitate the mounting, the inner spherical member 15 isdivided according to the vertical transverse plane of the device and thebottom of the said member 15 is depressed at 22 in such a manner, that asmall channel is formed parallel with the axis of the louder-rod 2. Thelongitudinal sides of said channel 23 abut the head 24 of a rivet 25secured in the casing 16, the said rivet-head being flattened at bothsides. Said channel 23 is equal in width to the head 24 of rivet 25 (seeFigure 3).

T he casing 16 is provided with hollow flar ing rectangular projections.30 and 31 for the passage of the butler-rod 2 and the drawing bolt 7respectively which (in conjunction 7.; with the channel 23 of suitablelength) render possible the vertical deviations a: and thecorrespondingly larger horizontal deviations ,8 arising during theoperation, while a rotation of the butter-rod about its axis isprevented by the flattened rivet-head 2 1, which closely rests againstthe longitudinal side walls of channels 23. As the shaft of therivet-head is mounted freely rotatable in the casing 16, it does notprevent the deflections 85 of the louder-rod in the horizontal plane.

We claim A drawing and pushing device for control couplings of avehicle, comprising a spherical outer casing adapted to be secured to avehicle, said casing having diametrically opposed openings therein, aspherical inner casing rotatably mounted within the casing, said innercasing having diametrically opposed apertures of squared cross-sectionadjacent to and smaller than the openings in the casing, and having achannel at the vertical axis, a buffer rod slidably mounted in thespherical inner casing and extending through the spherical outer casing,a spring mounted 100 tures.

Within the sphericalinner casing concentric to the bufl'er-rod,followers abuttlng the ends I L of thesprin'g'toeompress saidspring upon1 I axial movement of said bufler rod, and a rivet 7 head mounted in theinner partrof the verti- V cal axis of the spherical oute r casin gextend- V ing into the channel in' thespherical inner easing te -limitthe axial'rotation'of the bufier:

I'Odg r v In testimony whereof We affix Ouisi ns;

'JOHANN LENZ." I

.ADOLF SCHRELLE.

